Improvement in machines for sawing staves



, H. ECORNISH & 0.1. HUNT. MACHINES FOR S AWIITG STA'V'ES. No -173,767.

Patented Feb. 22., I876.'

Elven 509'.-

N- PETERS. PHOTO UNITED PATENT OFFTCEE.

. HARRY B. OOENISH AND OHAEL S P. HUNT, OE MINNEAPOLIS, MINNESOTA,ASSIGNORS OF TWO-THIRDS THEIR RIG T TO J. D. TUTNAM & 00., OF EIVEFALLS, AND ISRAEL GRAVES, OF HUDSON, WISOONSIN.

II VIPROVEMENTIN MACHINES FOR'SAW ING 'STAVES.

Specification forming part of Letters Patent No. 173,767, dated February22, 1876; application filed December 4, 1875.

To all whom it may concern:

Be it known that we, HARRY BUTTON COE- NISH and CHARLES PLAT HUNT, ofMinneapolis, Hennepin county, State of Minnesota, have invented anImprovement in Machines for Sawing Staves,-of which the following is aspecification:

' This invention relates to improvements in machines for sawing theordinary stave-bolt into staves; and consists in the combination ofdevices, as will be hereinafter fully described, and pointed out in theclaims.

In the aecompanyin g drawing, forming part of this specification, Figure1 is a perspective view of the machine. Figs. 2, 3, and 4 are detachedviews. Fig. 5 is an end view.

r A is the main framing of the machine, upon which the operatingmechanism is mounted. B is an endless-band saw, traveling aroundhorizontal pulleys G 0. The pulley O is mounted upon a vertical spindle,0, supported in adjustable transverse bars 61 cl, sliding in guides orways in the frame A. To these bars screw attachments d are affixed insuch manner that, by turning the Screw-nuts d, the bars 01 d, carryingthe spindle and pulley c C, may be drawn nearer to or forced fartherfrom the pulley O, for the purpose of tighten ing the band-saw whenrequired. The band- Saw runs over two circular revolving rests orguides, B B, secured to the frame of the machine, for keeping the saw ina straight horizontal position with the reel carrying the stave-bolt,andrevolving at right angles with the movement of the saw.

- secured to one side of the frame of the machine, for supporting therevolving shaft 6, carrying thereel-heads E E. The reel-heads arearranged to receive four or more beams, b,'and each beam is providedwith two sliding jaws, a a, between which the stavebolt is secured. Thejaws a a are provided with racks ala, in which works a, pinion, a,mounted upon a square-headed bolt, 01/, having a ratchet, b, engagingwith a pawl, b, on the beam 1). x

F Fare brackets,.

When the stave-bolt is placed between the jaws a a the bolt a is turnedwith a wrench, whereby the pinion a, working in the racks a a of thejaws a a, draws them toward each other, confining the stave-bolttherein, the

jaws being securely held in place by the ratchetand pawl b b.

To each of the beams is also secured a lever, h,which operates two rods,ff, connected therewith, and which, when depressed, extends the rodsthrough the radial slots f in the reelheads into grooves g on the innerfaces of two stationary disks, G G, secured to the brackets F Thegrooves g, instead of meeting or making a complete circle, run into thenext groove outside or toward the circumference of the disks. By thismeans the rods f f, resting in the interior grooves of the disks whilethe reel is revolving, will cause the beam carrying the stavebolt to besawed to move outward toward the band-saw the thickness of a stave ateach revolution of the reel, thus antomatically feeding the stave-boltto the saw until the rods have reached the outer circle of the grooves,(which is a complete circle,)'where the beam will revolve freely, butadvance no farther. The reel is then stopped. and a new stave-boltsecured to the beam, which is accomplished by bringing the beam 1) overor on top of the shaft, raising the pawl b, and turning back the bolt a,whichreleases the unsawed portion of the stave-bolt-or timber,

which is removed and a new stave-bolt secured therein, as beforedescribed. The lever h is then raised, which withdraws the rods ff fromthe grooves g in the disks, when the beam falls down upon the shaft 0.The lever h is again depressed, forcing the rods into the inner grooveof the series on the disks. The reel is then revolved, causing thestave-bolt to be fed automatically to the band-saw.

Power is applied to'the large pulley I on the vertical shaft 0 fordriving the band-saw. A short belt from the small pulley 21- on thevertical shaft 0 to the pulley J on the short horizontal shaft M, andanother belt from the pulley' K on the horizontal shaft to the pulley Non the reel-shaft, communicate motion to the reel-shaft. v p

The operation of the machine is deemed obvious from the foregoingdescription.

.'We claim as our. invention- 1. The combination, with an endlessbandsaw, B, of the revolving reel-heads E E and headed bolt a, ratchet b,and pawl b", for the purpose specified.

3. The combination, with the stationary grooved disks G G, of the rods ff, lever h, and beam b, substantially as and for the purpose specified.

In testimony that we claim the foregoing we have hereunto set our hands.

HARRY BUTTON GORNISH. 7 CHARLES .PLAT HUNT. Witnesses:

ABNER MoRsE, JOHN DAY PUTNAM.

